Learn JavaScript MCQ Questions with answers and solutions.

A

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Q. Which method returns the string starting at the specified position?

(A) substr()
(B) getSubstring()
(C) slice()
(D) None of the above

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Q. The tag <noscript> will work __________________

(A) only with external scripts
(B) with internal and external scripts
(C) whether there is javascript or not
(D) only in browsers that don’t know what javascript is.

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Q. Browsers that do not understand Javascript _______

(A) ignore all tags <script> and <noscript>
(B) display the content of the tags <script>
(C) display the content of the tags <noscript>
(D) display the content of the tags <script> and <noscript>

A

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Q. Which of these contains an executable statement?

(A) // var x = 0; // var y = 0;
(B) /* var x = 0; // var y = 0; */
(C) /* var x = 0; */ var y = 0;
(D) // var x = 0; /* var y = 0; */

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Q. What kind of an expression is “new Point(2,3)”?

(A) Primary Expression
(B) Object Creation Expression
(C) Invocation Expression
(D) Constructor Calling Expression

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Q. “An expression that can legally appear on the left side of an assignment expression.” is a well known explanation for variables, properties of objects, and elements of arrays. They are called

(A) Properties
(B) Prototypes
(C) Lvalue
(D) Definition

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Q. The output for the following code snippet would most appropriately be

Code:

var a=5 , b=1
var obj = { a : 10 }
with(obj) 
{
      alert(b)
}

(A) 10
(B) Error
(C) 1
(D) 5

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Q. A statement block is a

(A) conditional block
(B) block that contains a single statement
(C) both conditional block and single statement
(D) block that combines multiple statements into a single compound statement

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Q. The “var” and “function” are

(A) Keywords
(B) Declaration statements
(C) Datatypes
(D) Prototypes

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Q. In the below switch syntax, the expression is compared with the case labels using which of the following operator(s) ?

Code:

switch(expression)
{
    statements
}

(A) ==
(B) equals
(C) equal
(D) ===

JavaScript MCQs with answers Page - 61

Q. Which method returns the string starting at the specified position?

Q. The tag <noscript> will work __________________

Q. Browsers that do not understand Javascript _______

Q. Which of these contains an executable statement?

Q. What kind of an expression is “new Point(2,3)”?

Q. “An expression that can legally appear on the left side of an assignment expression.” is a well known explanation for variables, properties of objects, and elements of arrays. They are called

Q. The output for the following code snippet would most appropriately be

Q. A statement block is a

Q. The “var” and “function” are

Q. In the below switch syntax, the expression is compared with the case labels using which of the following operator(s) ?

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